Process for making grease-cup bodies.



0. ZERK.

PROCESS FOR MAKING GREASE CUP BODIES.

APPLICATION FILED JULY 31,1913.

21. %5fi15; Patented May15,1917.

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TTED snares PATENT OFFICE.

OSCAR ZERK, OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO GEORGE W. BOWEN, OF AUBURN, NEW YORK.

PROCESS FOR MAKING GREASE-CUP BODIES.

Application filed July 31, 1913.

To all whom it may concern:

Be it known that I, OscAR ZERK, a subject of the Emperor of Austria, residing at Cleveland, inthe county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Processes for Making Grease-Cup Bodies, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The object of this invention is to enable a cheap and rapid production of grease cup bodies of the type wherein there is a tubular receptacle with a threaded nipple at the end thereof. Such bodies usually have an extended threaded head, whereby they may cooperate with a cap to contain grease fed into and through the receptacle of the body. My invention enables the body to be made by certain steps of stamping from sheet metal resulting in the production of a body of the desired shape having the metal of varying thickness, according to the requirements of usage. The steps'by which I accomplish this result are hereinafter more fully explained in connection with the drawings and the essential characteristics of the process are summarized in the claims.

In the drawings, Figures 1, 2, and 3 are vertical central sections through some of the dies used in my process illustrating three of the important steps thereof; Fig. 4 is a cross section through certain dies for stamping the shank of the body into a hexagonal form. In each of these views the body is shown in cross section. I Fig. 5 is a perspective View of the completed body.

Fig. 1 illustrates at 1O afemale die having a somewhat conical or flaring recess 11, which rounds outwardly near the top and then has an upwardly extending portion 12. 15 indicates the cooperating male die, which is formed approximately corresponding to the recess and is rounded at its end, as shown at 16. Flat stock. which has been made in the form of a suitable cup is placed within the dies 10 and 15, and when these dies are forced together, as shown in Fig. 1, this stock assumes the form shown at A in that figure.

The body A, shown in Fig. 1, is treated. in subsequent dies to give it a more defined laterally extending head until it has substan- Specification of Letters Patent.

Patented May 115, 191?.

Serial no. 782,181.

tially the shape shown at B in 2. It

is then placed in a female die such as shown at 20in Fig. 2, and a male die, in the form of a cylindrical mandrel 25, is forced into it. The edge of the male die is chamfered, as shown at 26, and the action of this die in passingjdown within the cylindrical portion 21 of the female, causes the metal of the.body to flow so that the bulge b where the shank joins the head is removed and becomes a parallel side of the wall while the bulge is formed, as shown at b in the lower portion of the body which is beyond the stroke of the male die.

Such a body, as shown at B in Fig. 2, is now transferred to other dies and its lower portion is shortened and thereby increased .as the flaring portion 0 connecting this with the main portion 0 of the shank.

The body having the form shown at C in Fig. 3 is now treated by dies to give the shank portion 0 a hexagonal form inside and out. To this end a hexagonal mandrel 40, Fig, 4, is placed within the body and dies 41 and 42 having semi-hexagonal recesses are brought onto the outsides, whereby the shank portion 0 is given a hexagonal shape.

After leaving the dies shown in Fig. 4 the body has a hole punched through its extreme bottom and the nipple portion 0 is threaded, as shown at 0 Fig. 5, and the head portion is also threaded, as shown at 0 The body is now completed and is adapted to be screwed into a suitable opening and to carry a suitable cap, as is well understood.

It will be seen that the stamping operations described may be conducted cheaply and rapidly, thus converting ordinary fiat stock into the body shown in Fig. 5. When the body is completed the thickening at the nipple and the flaring portion stiffens it where it is subjected to the greatest strain form is held internally and externally throughout its entire length with the exception of the inner end portion being compressed.

2. The process of making a grease cup body, consisting in forming the body into an elongated form closed at one end, then causing the metal to flow toward the closed end of the body to thicken the same, and compressing the closed end by pressure applied to said end while the cup like form is held internally and externally throughout its length with the exception of the closed end.

8. The process of making a grease cup body from sheet metal consisting in stamping the metal into a cu like form having a cylindrical shank close at its outer end and formed with a reduced extension at said end, causing the metal to flow from the large end of the shank into the-reduced extension, and compressing the extension endwisely when the blank is held internally and externally with the exception of a portion of said re duced extension.

4:. The process of making grease cup bodies consisting of forming a blank into an elongated form having a cylindrical shank, and pushing the metal from the upper end of the bore of the shank toward the lower end thereof.

5. The process of making grease cup bodies consisting in forming a blank into an elongated form having a tubular shank, pushing the metal toward the lower end of the shank and compressing the lower end of the shank while the form is held internally and externally.

6. The process of making grease cup bodies consisting of forming a blank into an elongated form having a flattened discoidal head and a tubular shank which is thickened in the vicinity of the juncture of the shank and the head, with respect to the remainder of the shank, and then pushing some of the metal QIE' the thickened portion toward the end of the shank. y In testimony whereof, I hereunto affix m signature in the presence of two witnesses.

OSCAR ZERK. 

